| Factory | Number | Cross Interchange Type | Relevance |
|---|---|---|---|
| TIMKEN | MU1221UM | Direct Cross Interchange | 1 |
| FEDERAL | MU1221UM | Indirect Cross Interchange | 1 |
| Precision Seals & Bearings | MU1221UM | Indirect Cross Interchange | 1 |
| DT Components | MU1221UM | Indirect Cross Interchange | 1 |
| FORD | C3TZ4615A | Indirect Cross Interchange | 1 |
| FORD | C3TA4615A | Indirect Cross Interchange | 1 |
| FEDERAL MOGUL | MU1221UM | Indirect Cross Interchange | 1 |
| SKF | U1221YM | Indirect Cross Interchange | 1 |
| SKF | U1221TM | Indirect Cross Interchange | 1 |
| SKF | MU1221UM | Indirect Cross Interchange | 1 |
| SKF | MU1221TM | Indirect Cross Interchange | 1 |